ISL62386 Datasheet, PDF (5/20 Pages) Intersil Corporation – High-Efficiency, Quad Output System Power Supply Controller for Notebook Computers

ISL62386
Typical Application Circuits The following typical application circuits generate the 5V/8A and 3.3V/8A main supplies in a
notebook computer. The input supply (VBAT) range is 5.5V to 25V.
VBAT
4x10µF
3 .3 V
0.22µF
4.7µH
IRF7821
330µF
750
1200pF
45.3k
0.022µF 14k
IRF7832
14k
B O O T1
V _IN
BOOT2
UGATE1
PHASE1
UGATE2
PHASE2
LGATE1
LGATE2
ISL62386
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
IRF7821
0.22µF
4.7µH
14k 0.022µF
IRF7832
14k
5V
330µF
750
68.1k _1200pF
FB1
FB2
10k
AGND1
9.09k
AGND2
3 .3 V
4.7µF
5V
LDO3
LDO5
PGOOD
EN1
100k
LDO5
4.7µF
EN2
LD O 3EN
VCC
1µF
PGND
FCCM
FSET1
FSET2
24.3k
0.01µF
A G N D 1 /2
19.6k
0.01µF
AGND2
AGND1
FIGURE 1. TYPICAL APPLICATION CIRCUIT WITH INDUCTOR DCR CURRENT SENSE
VBAT
4x10µF
3 .3 V
330µF
0.001
1k
0.22µF
4.7µH
1k
750
1200pF ^45.3k
BOOT1
V _IN
IRF7821
UGATE1
PHASE1
IRF7832
LGATE1
BOOT2
IRF7821
UGATE2
PHASE2
IRF7832
LGATE2
ISL62386
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
0.22µF
4.7µH
0.001
1k
1k
5V
330µF
750
68.1k
1200pF
FB1
FB2
AGND1
10k
3 .3 V
AGND2
LDO3
9.09k
4.7µF
5V
LDO5
PGOOD
EN1
100k
LDO5
4.7µF
EN2
LDO3EN
VCC
1µF
PGND
FCCM
FSET1
FSET2
24.3k
0.01µF
19.6k
0.01µF
A G N D 1 /2
AGND2
AGND1
FIGURE 2. TYPICAL APPLICATION CIRCUIT WITH RESISTOR CURRENT SENSE
5
FN6831.0
February 4, 2009